switch is called a facing-point switch. A train passing through the turnout so that it gets to the frog before
reaching the switch points is making a trailing-point move. If most of the trains make trailing movements over
the switch, it is called a trailing-point switch. The arrows in the diagram of a switch in figure 2.12 indicate
facing- and trailing-point movements.
Figure 2.12. Facing- and Trailing-Point Movements.
Three types of rails are to be found in a turnout. They are the guard; closure, and stock rails. Each
performs a different job, as the subparagraphs following explain. The location of each type is noted in figure
Figure 2.13. Location of Guard, Closure, and Stock Rails.